Westwood One Investment Managers Inc.

2. Based on the scale of measurement for each variable listed below, which measure of central tendency is most appropriate for describing the data?

17 In regression analysis, the coefficient of determination R2 measures the amount of variation in y

·  How were measures of variation used in the study? What conclusions can you draw based on the variation?

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability?

d. It should appear in the tail signifying a negative relationship, with .05 in that tail.

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability?

AJ DAVIS is a department store chain, which has many credit customers and wants to find out more information about these customers. A sample of 50 credit customers is selected with data collected on the following five variables:

Question 4: The mode is the most frequently occurring value in a set of data so here the mode is 178 so the answer is e.

This test is a bit more complicated, in particular because the degrees of freedom are calculated from a much more complicated formula. Statistical software packages will handle this part for you under normal circumstances, but if you need to have the formula, here it

The coefficient of variation is in the “fair” range for data consistency, for all quartiles except the top quartile which is in the “good” range. (Gardner, 2012)

7. The data set for this problem can be found through the Pearson Materials in the Student Textbook Resource Access link,

10. Using measures of center and measures of variability compare the number of credit hours students in this sample are taking and the number of hours watching television.

5. The standard deviations of the groups are different between these two data sets. This implies that both girls and the boys groups have a large variability in their data. The reason is that the standard deviation for boys is 5.9 and the standard deviation for girls is 5.0. This means the data has a wide range of data within the mean.

Directions: Answer the following problems IN DETAIL. Your analysis must be typed and should be free of grammatical errors and “slang” terms.” Wherever appropriate, make sure you supplement your discussion with graphical analysis and equations. The graphs may be hand drawn, but please make sure they are neat. There are no restrictions or requirements on working in groups. The one exception is that each person must hand in his/her OWN work. In economic terms, there are no input restrictions; however, the output MUST be yours.

In terms of independent variables, by referring to the Appendix, figure 1 reveals the summary of the sample; it also